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From: Tom Lane <[email protected]>
To: [email protected]
Cc: [email protected]
Cc: Andrew Dunstan <[email protected]>
Cc: Florents Tselai <[email protected]>
Subject: Re: BUG #19409: Function jsonb_strip_nulls() changed from immutable to stable.
Date: Fri, 13 Feb 2026 15:18:19 -0500
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

PG Bug reporting form <[email protected]> writes:
> ... this fails in PostgreSQL 18, because the jsonb_strip_nulls ( target
> jsonb [,strip_in_arrays boolean ] ) function changed from immutable to
> stable.

A bit of git excavation shows that this changed here:

Author: Andrew Dunstan <[email protected]>
Branch: master Release: REL_18_BR [4603903d2] 2025-03-05 10:04:02 -0500

    Allow json{b}_strip_nulls to remove null array elements
    
    An additional paramater ("strip_in_arrays") is added to these functions.
    It defaults to false. If true, then null array elements are removed as
    well as null valued object fields. JSON that just consists of a single
    null is not affected.
    
    Author: Florents Tselai <[email protected]>
    
    Discussion: https://postgr.es/m/[email protected]

It looks like a thinko to me, because surely the strip_in_arrays
parameter did not make the function more mutable than before.
Nor did a quick search find any discussion of the point in the
thread.

			regards, tom lane

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